Kaboodle is a website that lets you catalog and display your collections. They’ve partnered with eBay, which allows users to buy and sell their stuff AND display it on Kaboodle. So you can see how this might be useful for someone who has a collection of coins, stamps, books, or–tomatoes?

Yeah, tomatoes. This is too cool. There’s also a mint collection, both posted by a "gardenless gardener" in the UK.